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No information was included in documents made public today about the 'unreasonable behaviour'.

In the section asking her to enter her occupation, Price describes herself as 'TV personality, author, businesswoman'.

Moving on: Katie is also divorced from Peter Andre (left). She has most recently been romantically linked to on-off boyfriend Leandro Penna

The couple married in Las Vegas in February 2010, shortly after cagefighter Reid finished a stint on Celebrity Big Brother.

They had been dating for around seven months when they tied the knot.

In January last year, the 33-year-old mother of three - also known as Jordan - confirmed she had separated from Reid.

Announcing the news, Price said in a statement: 'Alex and I have had a number of difficulties over the past few months.

'I accept that these were in part caused by my marrying too quickly - we all make mistakes and this was one.

Happy together: Alex is expecting his first child with fiancée Chantelle Houghton

'However, Alex changed from the man I fell in love with and some of his behaviour became difficult for me to understand and caused issues.

'I have tried to help him with these issues but they have put a considerable strain on our relationship.'

Although no specifications were made today about the 'unreasonable behaviour', Katie has previously spoken out about Reid's 'desire to promote himself' causing issues in their relationship.

And the glamour model insisted his obsession caused him to change during their union.

She has previously said that his 'desire to promote
himself caused a change in the dynamic of our relationship and
contributed to our alienation'.

When the pair first started up their romance, Alex was a cagefighter and a struggling actor, but he was thrust into the spotlight when he began dating the reality star.

He then started to appear on Katie's ITV2 reality show, before going on to appear in Celebrity Big Brother in 2010.

And the appearance gave him more exposure as he was eventually crowned winner of the series, beating the likes of Katie's other ex Dane Bowers, Hollywood hard man Vinnie Jones and Ivana Trump.

Katie quoted her dismay at his alleged changed personality when she filed a 600-word statement at the time of their separation, stating that she married Alex 'too quickly' and that he had 'changed' from the 'man I fell in love with'.

And following added problems with trying to conceive the pair flew out to a remote place in the Indian Ocean for a 'make or break' holiday.

But on her return, Price admitted their marriage was in crisis via her Twitter page.

In happier times: Katie allowed Alex to appear on her ITV2 reality show but she has previously complained about him changing as he tried to promote himself later on in their relationship

And it appeared the final straw was when Alex was photographed teaching her five-year-old son Junior to fight in the gym.

She said at the time: 'I had hoped that Alex and I could remain friends but I am
not sure if that is possible given events since last Sunday...

'...The intervening period has, however, seen a number of false
stories appear and photographs of Alex with my son Junior in the gym
which it is absolutely clear were posed for.

'Alex is fully aware that I have sought to remove my children from
the public eye now they are of an age to understand and be affected by
media coverage of them.

'I feel incredibly let down that he did this
while asking me for more time to discuss our relationship and just hope
that the stories circulating that he sold those pictures are not true.'

But Reid insisted he wasn't to blame for the photographs being released to the press.

In his own statement, the sports man said that he 'maintain(ed) strong support for Katie in her wish to
keep the kids out of the limelight' but said 'sadly someone sold the
photo' of him with Junior.

Katie was previously married to singer Peter Andre, with whom she has two children.

Reid is now engaged to glamour model Chantelle Houghton, with whom he is expecting his first child.